Adjustable chain type high-torque pipe vice

Abstract

The utility model relates to the technical field of petroleum drilling operation equipment, in particular to an adjustable chain type high-torque pipe vice which comprises a vice handle, one side of the vice handle is rotationally connected with a shaft pin, one side of the shaft pin is fixedly connected with a vice jaw, the vice handle is hinged to the vice jaw through the shaft pin, a tooth groove is fixedly formed in the inner side of the vice jaw, and the tooth groove is fixedly connected with the vice jaw. A tooth groove is formed in the jaw, a tooth plate is rotationally connected into the tooth groove, a pressure spring is fixedly connected into the tooth groove, the pressure spring abuts against and limits the tooth plate in the tooth groove, a tubular column is arranged below the jaw, and a chain is arranged at the jaw position of the jaw. Compared with the prior art, the problem that in the prior art, clamping requirements of multi-size tubular columns cannot be flexibly met is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to petroleum drilling operation equipment technical field especially relates to an adjustable chain type high torque pipe vice. BACKGROUND

[0002] In the petroleum drilling construction process, the connection and disassembly of tubular goods and tool joints are key links, which directly affect the operation efficiency and construction safety. The traditional thread tightening or loosening operation mainly relies on manual operation, and the common tool is a jaw clamp. However, these traditional techniques and tools have many problems in practical application.

[0003] In the prior art, the patent literature with the publication number CN218052148U discloses a special thin-walled pipe vice jaw, which is provided with a fixing mechanism to adapt to different shaped parts for machining, and the shape of the jaw is replaced when not needed. However, in actual application, different pipe diameters have different requirements for the jaw, and frequent replacement affects work efficiency. UTILITY MODEL CONTENT

[0004] Therefore, the utility model aims to provide an adjustable chain type high torque pipe vice to solve the problem of flexible adaptation to multi-size pipe column clamping requirements in the prior art.

[0005] To achieve the above purpose, the utility model provides an adjustable chain type high torque pipe vice, which comprises a vice handle, one side of the vice handle is rotationally connected with a shaft pin, one side of the shaft pin is fixedly connected with a vice jaw, the vice handle is hinged with the vice jaw through the shaft pin, the inner side of the vice jaw is fixedly provided with a tooth groove, a tooth plate is rotationally connected inside the tooth groove, a compression spring is fixedly connected inside the tooth groove, the tooth plate is pushed against and limited by the compression spring inside the tooth groove, a pipe column is arranged below the vice jaw, a chain is arranged at the jaw opening position of the vice jaw, the chain surrounds the pipe column, a pawl is rotationally installed on the vice handle, the chain is meshingly connected with the cam part of the pawl, a rivet is fixedly connected on the pawl, a lock jaw is rotationally connected on the rivet, the pawl is hinged with the lock jaw through the rivet, one end of the lock jaw is fixed with the vice jaw through a shaft pin, a lock pin is fixedly installed on the vice handle, a nut is fixed above the vice jaw, an adjusting screw is fixedly connected below the nut, one end of the adjusting screw is fixed with the chain.

[0006] Preferably, the front end of the vice handle is hinged with the vice jaw through the shaft pin, the shaft pin is fixed at both ends by a check ring to limit the axial movement of the shaft pin, the pawl is arranged on the inner side of the vice jaw, and the lock jaw can be positionally locked with the pawl through the pawl and the lock jaw.

[0007] Preferably, the chain is composed of multiple groups of chain links arranged side by side, the chain links are connected by a pin shaft, one end of the chain is fixed to the nut by an adjusting screw, the arc surface of the nut is in contact with the fastening surface of the jaw, and the other end of the nut is in sliding contact at the jaw opening of the jaw.

[0008] Preferably, the front end cam portion of the pawl is engaged with the chain, the pawl is connected to the inner wall of the jaw by the lock pin, and the upper circular arc groove of the pawl is matched with the pin shaft.

[0009] Preferably, the toothed plate of the jaw handle head is in non-toothed surface contact with the chain, and the chain is in enveloping contact around the pipe column.

[0010] Preferably, the adjusting screw is threadedly connected with the jaw, one end of the adjusting screw is connected with the nut, and the fastening degree between the chain and the jaw is adjusted by rotating the adjusting screw.

[0011] The utility model discloses the beneficial effects of:

[0012] 1. The adjustable chain type high-torque pipe vice can be adjusted to the outer diameter size of various pipes by the engagement of the chain and the pawl, and the pawl is locked to the appropriate position, so that the chain is self-locked, the friction between the chain and the pipe surface is increased while the torque is increased, and the self-tightening function is also provided.

[0013] 2. The adjustable chain type high-torque pipe vice can quickly assemble or disassemble the pipe and tool joint, is widely applicable, can meet different specifications of pipes, has high universality, improves work efficiency and reduces labor intensity. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical scheme of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, and obviously, the drawings in the following description are only the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creating creative labor.

[0015] Fig. 1 It is a schematic diagram of the pipe column fastening state of the utility model;

[0016] Fig. 2 It is a schematic diagram of the pipe column loosening state of the utility model;

[0017] Fig. 3 It is a schematic diagram of the chain structure of the utility model.

[0018] The marks in the figure are:

[0019] 1. Nut; 2. Adjusting screw; 3. Jaw; 4. Tooth plate; 5. Chain; 6. Shaft pin; 7. Pawl; 8. Lock pin; 9. Rivet; 10. Handle; 11. Locking jaw; 12. Column. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of the utility model more clearly, the following will be further explained in detail in combination with specific embodiments.

[0021] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the utility model should be understood as the usual meaning by the person skilled in the art. The "first", "second" and similar words used in the utility model do not represent any order, quantity or importance, but are only used to distinguish different components. "Include" or "contain" and similar words mean that the elements or objects before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connection" or "connected" and similar words are not limited to physical or mechanical connection, but can include electrical connection, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to represent the relative positional relationship, which may change accordingly when the absolute position of the described object changes.

[0022] As Figs. 1 to 3As shown, an adjustable chain type high torque pipe vice includes a vice handle 10, one side of the vice handle 10 is rotatably connected with a shaft pin 6, one side of the shaft pin 6 is fixedly connected with a vice jaw 3, the vice handle 10 is hinged with the vice jaw 3 through the shaft pin 6, the inner side of the vice jaw 3 is fixedly provided with a tooth groove, the inside of the tooth groove is rotatably connected with a tooth plate 4, the inside of the tooth groove is fixedly connected with a compression spring, the compression spring pushes the tooth plate 4 in the tooth groove and limits the position of the tooth plate 4, a pipe column 12 is arranged below the vice jaw 3, a chain 5 is arranged at the jaw opening position of the vice jaw 3, the chain 5 surrounds the pipe column 12, a ratchet pawl 7 is rotatably installed on the vice handle 10, the chain 5 is meshingly connected with the cam portion of the ratchet pawl 7, a rivet 9 is fixedly connected on the ratchet pawl 7, a lock claw 11 is rotatably connected on the rivet 9, the ratchet pawl 7 is hinged with the lock claw 11 through the rivet 9, one end of the lock claw 11 is fixed with the vice jaw 3 through the shaft pin 6, a lock pin 8 is fixedly installed on the vice handle 10, a nut 1 is fixedly arranged above the vice jaw 3, an adjusting screw 2 is fixedly connected below the nut 1, one end of the adjusting screw 2 is fixed with the chain 5. The front end of the vice handle 10 is hinged with the vice jaw 3 through the shaft pin 6, the shaft pin 6 is fixed by a check ring at both ends to limit the axial movement of the shaft pin 6, the ratchet pawl 7 is arranged inside the vice jaw 3, the ratchet pawl 7 is connected with the lock claw 11 to enable the lock claw 11 to lock the position of the ratchet pawl 7. The chain 5 is composed of multiple groups of chain links arranged side by side, the chain links are connected by pin shafts, one end of the chain 5 is fixed to the nut 1 through the adjusting screw 2, the arc surface of the nut 1 is in contact with the buckling surface of the vice jaw 3, the other end of the nut 1 slides at the jaw opening of the vice jaw 3. The front end cam portion of the ratchet pawl 7 is engaged with the chain 5, the ratchet pawl 7 is connected with the inner wall of the vice jaw 3 through the lock pin 8, the upper circular arc groove of the lock claw 11 cooperates with the pin shaft. The tooth plate 4 at the head of the vice handle 10 forms non-tooth surface contact with the chain 5, the chain 5 surrounds the pipe column 12 to form envelope contact. The adjusting screw 2 is threadedly connected with the vice jaw 3, one end of the adjusting screw 2 is connected with the nut 1, by rotating the adjusting screw 2, the buckling degree adjustment between the chain 5 and the vice jaw 3 is realized, the chain 5 surrounds the pipe to form large area envelope contact, which increases the friction while reducing the damage to the surface of the pipe, by rotating the adjusting screw 2, the buckling tightness adjustment between the chain 5 and the vice jaw 3 is realized, so that the pipe of different diameters can be adapted, the upper circular arc groove of the lock claw 11 cooperates with the pin shaft to realize flexible rotation and stable locking of the ratchet pawl 7.

[0023] Workflow:

[0024] The device is connected by the vice handle 10, the vice jaw 3, and the ratchet pawl 7 using the shaft pin 6, the shaft pin 6 is fixed by a check ring at both ends to limit the axial movement of the shaft pin 6, the ratchet pawl 7 is loaded with the lock claw 11 in the inner range, and is connected by the rivet 9, and riveting processing is performed at the orifice.

[0025] The tooth plate 4 is installed in the jaw 3 and is pressed by a compression spring to prevent the tooth plate 4 from moving. In operation, the chain 5 is threaded through the pipe column 12, one end of the chain 5 is pulled out from the head hole of the jaw handle 10, the other end is contacted by the arc surface of the nut 1 and the clamping surface of the jaw 3, the locking claw 11 is pressed down, the upper arc groove of the locking claw 11 is on the pin, the front end cam part of the ratchet claw 7 is clamped on the arc between the chain plates, the movement of the chain 5 is limited, the nut 1 is tightened, at this time, the chain 5 is clamped on the outer surface of the pipe column 12. The wrench body is in a horizontal state, the steel wire connected to the tail post is pulled to tighten or loosen the thread. The chain 5 can provide greater strength, slide through the jaw opening of the jaw 3 and engage with the ratchet claw 7, adjust to various pipe diameters without disassembling the chain 5, within the clamping range, and has a self-tightening function, and increases the friction when the torque increases. The ratchet claw 7 is locked in the locking position by the locking claw 11, and the chain 5 will not slip no matter how much load is applied. After the thread tightening and loosening work is completed, the locking claw 11 is adjusted to the unlocking position, the ratchet claw 7 is rotated, and the nut 1 is loosened, at this time, the pipe wrench and the pipe column 12 are released. The friction force between the pipe column 12 and the chain 5 wrapped thereon clamps and rotates the pipe column 12, and the torque is generated by the engagement force between the partial tooth plate 4 at the front end of the jaw handle 10 and the chain 5. Because the jaw handle 10 does not have a force application point on the surface of the pipe column 12, no marks or damage to the surface of the pipe are generated.

[0026] Those skilled in the art will understand that the above discussion of any embodiment is merely exemplary and is not intended to suggest that the scope of the present application (including the claims) is limited to these examples; under the concept of the present application, the above embodiments or technical features in different embodiments can also be combined, the steps can be implemented in any order, and there are many other changes of different aspects of the present application as described above, which are not provided in detail for the sake of brevity.

[0027] The present application is intended to cover all such alternatives, modifications, and variations as fall within the broad scope of the appended claims. Accordingly, any and all such alternatives, modifications, equivalents, improvements and the like are intended to be encompassed by the present application.

Claims

1. An adjustable chain-type high-torque pipe vise, characterized in that, include: A clamp handle (10) is rotatably connected to one side of the clamp handle (10), and a jaw (3) is fixedly connected to one side of the pin (6). The clamp handle (10) is hinged to the jaw (3) via the pin (6). A tooth groove is fixedly opened on the inner side of the jaw (3), and a tooth plate (4) is rotatably connected inside the tooth groove. A compression spring is fixedly connected inside the tooth groove, and the compression spring presses against and limits the tooth plate (4) inside the tooth groove. A column (12) is provided below the jaw (3), and a chain (5) is provided at the jaw position of the jaw (3). The chain (5) surrounds the column (12), and a rotatable device is mounted on the clamp handle (10). The chain (5) is engaged with the cam portion of the pawl (7), and a rivet (9) is fixedly connected to the pawl (7). A locking pawl (11) is rotatably connected to the rivet (9). The pawl (7) is hinged to the locking pawl (11) through the rivet (9). One end of the locking pawl (11) is fixed to the jaws (3) through a pin (6). A locking pin (8) is fixedly installed on the handle (10). A nut (1) is slidably connected above the jaws (3). An adjusting screw (2) is fixedly connected below the nut (1). One end of the adjusting screw (2) is fixed to the chain (5).

2. The adjustable chain-type high-torque pipe vise according to claim 1, characterized in that, The front end of the pliers handle (10) is hinged to the jaws (3) via the pin (6). The two ends of the pin (6) are fixed by retaining rings to restrict the axial movement of the pin (6). The pawl (7) is located on the inner side of the jaws (3) and is connected to the locking pawl (11) via the rivet (9) so that the locking pawl (11) can lock the position of the pawl (7).

3. The adjustable chain-type high-torque pipe vise according to claim 1, characterized in that, The chain (5) is composed of multiple chain links arranged side by side, and the chain links are connected by pins. One end of the chain (5) is fixed to the nut (1) by an adjusting screw (2). The arc surface of the nut (1) is in contact with the snapping surface of the jaws (3). The other end of the nut (1) slides at the jaws (3).

4. The adjustable chain-type high-torque pipe vise according to claim 1, characterized in that, The front cam portion of the pawl (7) engages with the chain (5), the pawl (7) is connected to the inner wall of the jaw (3) through the locking pin (8), and the upper arc groove of the locking pawl (11) cooperates with the pin.

5. The adjustable chain-type high-torque pipe vise according to claim 1, characterized in that, The toothed plate (4) at the head of the pliers (10) forms a non-tooth surface contact with the chain (5), and the chain (5) forms an envelope contact around the column (12).

6. The adjustable chain-type high-torque pipe vise according to claim 1, characterized in that, The adjusting screw (2) is threadedly connected to the jaw (3), and one end of the adjusting screw (2) is connected to the nut (1). By rotating the adjusting screw (2), the engagement degree between the chain (5) and the jaw (3) can be adjusted.

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